Switch Yahoo Classic Mail

1- Sign in yahoo account you want to change

 2- click on option tab (UpperRight corner of yahoo window)

3- click on mail classic
this will pop up new window with caption "Switch to Yahoo!Mail Classic"
description:
                  Your're about to Switch to Yahoo classic
                  Before you do, we'd love you feedback
click on feedback if you want to...
Two Button
Switch to Yahoo! Mail Classice        Cancel

4- Cilck on Switch Button

A switching window apear here again you can click on feedback if you have to.

5- Refresh your page if Require

You have been Succussfully converted to Yahoo Classic